Here are all of the Mariners players entering free agency after 2025 season

As the Seattle Mariners fight to finally knock the Houston Astros from atop the AL West, front office decisions loom large with several key players set to potentially hit free agency this offseason.

While Seattle’s roster has thrived thanks to its blend of young talent and smart, aggressive deadline additions, maintaining this core (or choosing who to part with) will shape the team’s trajectory well beyond 2025. Jerry Dipoto and Justin Hollander will have no shortage of tough calls to make this winter.

These Mariners are eligible for free agency after 2025

Eugenio Suárez, 3B

Perhaps no impending free agent presents a more emotionally and structurally significant decision than Suárez. A cornerstone of Seattle’s clubhouse culture and a reliable third baseman, Suárez has also been a steady (albeit streaky) contributor at the plate. He's enjoying a career year, but his leadership, availability, and ability to come through in big spots provide more than just an intimidating presence in the middle of the order.

With third base depth shallow across the majors, Suárez could command a multi-year deal in free agency — one that the Mariners will have to weigh carefully against their payroll constraints and long-term plans. Third base production in Seattle has been abysmal since the team dumped Geno after the 2023 season, which should push ownership to not make another mistake by letting the fan favorite leave.

Josh Naylor, 1B/DH

The midseason acquisition of Naylor has paid immediate dividends. His left-handed bat added balance to Seattle’s righty-heavy lineup, and he’s been an impactful presence both offensively and defensively. At just 28 years old, Naylor is in his prime and could be viewed as a long-term fixture at first base.

But his price tag is only climbing. With Scott Boras as his agent and power-hitting corner infielders always in demand, Naylor could be one of the pricier free agents on the market. If the Mariners believe in this core and want to push beyond the ALDS in coming years, re-signing Naylor should be a top priority, even if it stretches the budget.

Donovan Solano, INF

This one is relatively straightforward. Solano, who signed as a veteran depth piece, has found himself squeezed out of consistent playing time as the season progressed. At 37, it’s hard to envision him returning in 2026. This is likely a mutual parting of ways.

Caleb Ferguson, LHP

While not a headline name, Ferguson has quietly been one of the most important stabilizers in Seattle’s bullpen. After an up-and-down start to the season, he’s found his rhythm and emerged as a trusted lefty late in games.

With Tayler Saucedo and Gabe Speier both dealing with inconsistencies or injuries at times, Ferguson’s reliability and experience have stood out. Re-signing him won’t break the bank, and with how volatile bullpens can be year to year, the Mariners would be wise to bring him back to maintain continuity in a relief corps that’s once again been among the league’s best.

Mitch Garver, DH/C

Garver’s mutual option for 2026 will almost certainly be declined by Seattle. The experiment hasn’t yielded the offensive pop the Mariners hoped for, and with limited defensive utility and inconsistent availability, he’s unlikely to be in the plans moving forward. The Mariners may look internally or to a more cost-effective DH alternative next season.

Jorge Polanco, 2B/DH

The Polanco situation is a bit more complicated. His contract includes a $6 million player option for 2026, which activates only if he reaches 450 plate appearances this year. He’s currently on pace for about 467 — cutting it close.

While Polanco hasn’t been the All-Star level contributor he once was in Minnesota, he’s offered steady production at designated hitter. If that player option kicks in, Seattle may welcome him back at a reasonable rate. But if it doesn’t, they’ll need to evaluate whether to negotiate a new deal or move on entirely — especially with middle infield depth emerging at the upper levels of the farm system.

Dylan Moore, INF/OF

Moore has been a mainstay with the Mariners since 2019. He was a Gold Glover just last year, and he got off to a surprisingly hot start at the plate this year. Since May 28, however, he has only three hits in 67 at-bats, with 38 strikeouts. When his contract expires at the end of 2025, his time with the Mariners will surely come to an end.

Andrés Muñoz, RHP

This might be the easiest decision the Mariners face this offseason. Muñoz has been flat-out dominant, solidifying himself as one of the premier high-leverage arms in baseball. His $6 million club option for 2026 is a bargain by every measure, and the Mariners will surely pick it up without hesitation. Locking him in helps preserve one of the strongest aspects of this roster: the bullpen.